Recently my S3 has felt very low on power and also using a lot of oil - 1-2ltrs per 500miles.
My local Audi specialist advised a new turbo - on removing mine I found a big crack in the housing so this was replaced with a nearly new replacement turbo.
My car felt great for 2weeks - all the power was back but still using oil. Recently the power has gone again - feels like it has about 150bhp. This is really strange - why o.k for 2weeks then all boost has gone again???
The car has seen 2 Audi specialist and a local garage - no one has any idea what the problem is.
Has anyone got any idea? I have changed the MAF + Turbo, no air leeks as far as I can see.